From 5517554e43131f542e5f95c94c5cd9a1bb989fab Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Thu, 24 Aug 2017 11:24:56 +1000 Subject: [PATCH] cifs: Add support for writing attributes on SMB2+ This adds support for writing extended attributes on SMB2+ shares. Attributes can be written using the setfattr command. RH-bz: 1110709 Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Reviewed-by: Pavel Shilovsky --- fs/cifs/cifsglob.h | 2 +- fs/cifs/cifsproto.h | 3 ++- fs/cifs/cifssmb.c | 3 ++- fs/cifs/smb2ops.c | 60 +++++++++++++++++++++++++++++++++++++++++++++ fs/cifs/smb2pdu.c | 10 ++++++++ fs/cifs/smb2proto.h | 3 +++ fs/cifs/xattr.c | 2 +- 7 files changed, 79 insertions(+), 4 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 221693fe49ec..808486c29f0d 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -421,7 +421,7 @@ struct smb_version_operations { size_t, struct cifs_sb_info *); int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, const char *, const void *, const __u16, - const struct nls_table *, int); + const struct nls_table *, struct cifs_sb_info *); struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, const char *, u32 *); struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 6eb3147132e3..4143c9dec463 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -484,7 +484,8 @@ extern ssize_t CIFSSMBQAllEAs(const unsigned int xid, struct cifs_tcon *tcon, extern int CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon, const char *fileName, const char *ea_name, const void *ea_value, const __u16 ea_value_len, - const struct nls_table *nls_codepage, int remap_special_chars); + const struct nls_table *nls_codepage, + struct cifs_sb_info *cifs_sb); extern int CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen); extern int CIFSSMBSetCIFSACL(const unsigned int, struct cifs_tcon *, __u16, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 72a53bd19865..48455afefec8 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -6264,7 +6264,7 @@ int CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon, const char *fileName, const char *ea_name, const void *ea_value, const __u16 ea_value_len, const struct nls_table *nls_codepage, - int remap) + struct cifs_sb_info *cifs_sb) { struct smb_com_transaction2_spi_req *pSMB = NULL; struct smb_com_transaction2_spi_rsp *pSMBr = NULL; @@ -6273,6 +6273,7 @@ CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int bytes_returned = 0; __u16 params, param_offset, byte_count, offset, count; + int remap = cifs_remap(cifs_sb); cifs_dbg(FYI, "In SetEA\n"); SetEARetry: diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 78516d3a133c..fb2934b9b97c 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -558,6 +558,62 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, return rc; } + +static int +smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, + const char *path, const char *ea_name, const void *ea_value, + const __u16 ea_value_len, const struct nls_table *nls_codepage, + struct cifs_sb_info *cifs_sb) +{ + int rc; + __le16 *utf16_path; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + struct cifs_open_parms oparms; + struct cifs_fid fid; + struct smb2_file_full_ea_info *ea; + int ea_name_len = strlen(ea_name); + int len; + + if (ea_name_len > 255) + return -EINVAL; + + utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); + if (!utf16_path) + return -ENOMEM; + + oparms.tcon = tcon; + oparms.desired_access = FILE_WRITE_EA; + oparms.disposition = FILE_OPEN; + oparms.create_options = 0; + oparms.fid = &fid; + oparms.reconnect = false; + + rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL); + kfree(utf16_path); + if (rc) { + cifs_dbg(FYI, "open failed rc=%d\n", rc); + return rc; + } + + len = sizeof(ea) + ea_name_len + ea_value_len + 1; + ea = kzalloc(len, GFP_KERNEL); + if (ea == NULL) { + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + return -ENOMEM; + } + + ea->ea_name_length = ea_name_len; + ea->ea_value_length = cpu_to_le16(ea_value_len); + memcpy(ea->ea_data, ea_name, ea_name_len + 1); + memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); + + rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea, + len); + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + + return rc; +} + static bool smb2_can_echo(struct TCP_Server_Info *server) { @@ -2706,6 +2762,7 @@ struct smb_version_operations smb20_operations = { .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, @@ -2799,6 +2856,7 @@ struct smb_version_operations smb21_operations = { .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, @@ -2902,6 +2960,7 @@ struct smb_version_operations smb30_operations = { .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, @@ -3006,6 +3065,7 @@ struct smb_version_operations smb311_operations = { .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ }; #endif /* CIFS_SMB311 */ diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index bf0ba3c15b63..d7595e735304 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -3196,6 +3196,16 @@ SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, 1, (void **)&pnntsd, &pacllen); } +int +SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_full_ea_info *buf, int len) +{ + return send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, + 0, 1, (void **)&buf, &len); +} + int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, const u64 persistent_fid, const u64 volatile_fid, diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 183389bfc8f6..003217099ef3 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -172,6 +172,9 @@ extern int SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, extern int SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, struct cifs_ntsd *pnntsd, int pacllen, int aclflag); +extern int SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_full_ea_info *buf, int len); extern int SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid); extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index de50e749ff05..52f975d848a0 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -84,7 +84,7 @@ static int cifs_xattr_set(const struct xattr_handler *handler, if (pTcon->ses->server->ops->set_EA) rc = pTcon->ses->server->ops->set_EA(xid, pTcon, full_path, name, value, (__u16)size, - cifs_sb->local_nls, cifs_remap(cifs_sb)); + cifs_sb->local_nls, cifs_sb); break; case XATTR_CIFS_ACL: {